This is the gold/platinum item store
This is the silver item store
So for people playing on live server you should keep in mind two things. On Beta GbG is different. We have double the attrition for double the rewards. So if you do 10k fights on live server you can expect 5k when live server changes over to this new system.
Now with the new trial system it has changed again.
What we've done is test the hardest (most rewarding) trial to see what we could reasonably expect over a 10 day GbG period.
Here are the numbers for a 10k fighter on live server/5k fighter on Beta on the hardest level.
Silver 175,556
Gold 7,083
Platinum 2,917
Now keep in mind this can all change and I fully expect this to change but we can only deal with what's here now. And what's here now is pathetic. While it's nice to have the opportunity to get the missing fragments one needs to complete buildings in inventory there is no way to see this as anything other than a diamond nerf.
They simply do not want you to have access to diamonds earned in-game. They only want you to buy them from cash shop.
GbG is going to die from Inno's greed.